PVC DPC membrane

lottie0311

my surveyor has recommended the installation of this and i wondered what it entailed? is it a sheet that needs to be installed or can this be injected?

Also, any idea on cost? our house is a 2 bed semi. dining room, living room and kitchen to first floor.

southcoastrgi

installed where ? wall, existing floor, new extension, do you already have a problem ? you need to provide a bit more info than you have

lottie0311

sorry, i'm very new to this and not clued up about damp at all!!

the damp was detected my a meter but is not really a problem inside. you cant see it, no plaster bubbling etc. no smell, just picked up on the device.

i assume the dpc will be in the walls.

cyclonebri1

You may also need a new surveyor;)

Correct me if I'm wrong but you don't inject PVC damp courses


How old is the house?

Does it have cavity walls?

Does it have a visible existing DPC

How gullible are you?, that's without offence, but it may be relevant after you answer those points,

southcoastrgi

I'm guessing this is to do with your other thread here

I'd suggest getting a couple of local damp proofing co (recommended ones if you can) to give you some quotes

lottie0311

i didnt know that it cant be injected, that was why i asked. The surveyor didnt say it had to be, he just said replace the PVC membrane and i wasnt sure in which form this was done. The company buying it arent bothered how it is dealt with, as long as the issue is resolved. The house was built roughy 1920, does have an exisiting DPC that needs renewing. i dont believe it has cavity wall insulation.

cyclonebri1

Around the 1920's thing changed, from the south coast at 1st and then upwards in a rough way of speaking.

If your property dates back to the twentys it would not have a plastic damp course, no way.

It would be lead, or, it could be slate, you may have cavity wall, in which case blue brick, the list is pretty endless to be honest.

You need to ask this chap why you need to replace said damp course and how he backs that up.

lottie0311

he has actually put in the report -

We suspect the original blue brick membrane to be upgraded by the installations of a PVC menbrane although this cannot be confirmed from visual inspection"

"Meter readings taking internally show areas of rising dampness remaining to front chimney breast with majority of walls in dining room and kitchen being affected. We recommend the advise of a damp specialist company before exchange of contracts"

cyclonebri1

lottie0311 wrote: »

he has actually put in the report -

We suspect the original blue brick membrane to be upgraded by the installations of a PVC menbrane although this cannot be confirmed from visual inspection"

"Meter readings taking internally show areas of rising dampness remaining to front chimney breast with majority of walls in dining room and kitchen being affected. We recommend the advise of a damp specialist company before exchange of contracts"

Well, blue bricks don't fail. The mortar joints can pass rising damp if you accept rising damp exists?

Go back to another expert, it's almost guaranteed he will tell you different.

lottie0311

well i guess thats what the damp surveyor will determine. just waiting to get it booked in....any ideas how long it takes?

spannerzone

Hmm another thread on the same subject won't really make it easy for us all to keep up with things!!

A damp meter ..... they're great for checking moisture in logs but pretty innacurate in walls.... simply pressing the damp meter prongs gently into your hand reveals damp..... or electrical resistance....not a very accurate measurement of damp!

A new surveyor that isn't employed by a damp proof company will give very different results.

http://www.heritage-house.org/pages/the-fraud-of-rising-damp.html